KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin

Jonathan Labadie-Bartz; Joseph E. Rodriguez; Keivan G. Stassun; David R. Ciardi; Kaloyan Penev; Marshall C. Johnson; B. Scott Gaudi; Knicole D. Colón; Allyson Bieryla; David W. Latham; Joshua Pepper; Karen A. Collins; Phil Evans; Howard Relles; Robert J. Siverd; Joao Bento; Xinyu Yao; Chris Stockdale; Thiam Guan Tan; George Zhou; Jason D. Eastman; Michael D. Albrow; Daniel Bayliss; Thomas G. Beatty; Perry Berlind; Valerio Bozza; Michael L. Calkins; David H. Cohen; Ivan A. Curtis; Gilbert A. Esquerdo; Dax Feliz; Benjamin J. Fulton; Joao Gregorio; David James; Eric L.N. Jensen; John A. Johnson; Samson A. Johnson; Michael D. Joner; David Kasper; John F. Kielkopf; Rudolf B. Kuhn; Michael B. Lund; Amber Malpas; Mark Manner; Nate McCrady; Kim K. McLeod; Thomas E. Oberst; Matthew T. Penny; Phillip A. Reed; David H. Sliski; Denise C. Stephens; Daniel J. Stevens; Steven Villanueva; Robert A. Wittenmyer; J. T. Wright; Roberto Zambelli

doi:10.3847/1538-4365/aaee7e

KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin

Jonathan Labadie-Bartz, Joseph E. Rodriguez, Keivan G. Stassun, David R. Ciardi, Kaloyan Penev, Marshall C. Johnson, B. Scott Gaudi, Knicole D. Colón, Allyson Bieryla, David W. Latham, Joshua Pepper, Karen A. Collins, Phil Evans, Howard Relles, Robert J. Siverd, Joao Bento, Xinyu Yao, Chris Stockdale, Thiam Guan Tan, George ZhouJason D. Eastman, Michael D. Albrow, Daniel Bayliss, Thomas G. Beatty, Perry Berlind, Valerio Bozza, Michael L. Calkins, David H. Cohen, Ivan A. Curtis, Gilbert A. Esquerdo, Dax Feliz, Benjamin J. Fulton, Joao Gregorio, David James, Eric L.N. Jensen, John A. Johnson, Samson A. Johnson, Michael D. Joner, David Kasper, John F. Kielkopf, Rudolf B. Kuhn, Michael B. Lund, Amber Malpas, Mark Manner, Nate McCrady, Kim K. McLeod, Thomas E. Oberst, Matthew T. Penny, Phillip A. Reed, David H. Sliski, Denise C. Stephens, Daniel J. Stevens, Steven Villanueva, Robert A. Wittenmyer, J. T. Wright, Roberto Zambelli

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Abstract

We present the discovery of KELT-22Ab, a hot Jupiter from the KELT-South survey. KELT-22Ab transits the moderately bright (V ∼ 11.1) Sun-like G2V star TYC 7518-468-1. The planet has an orbital period of days, a radius of , and a relatively large mass of . The star has , , K, (cgs), and [m/H] = ; thus other than its slightly super-solar metallicity, it appears to be a near-solar twin. Surprisingly, KELT-22A exhibits kinematics and a Galactic orbit that are somewhat atypical for thin-disk stars. Nevertheless, the star is rotating rapidly for its estimated age, and shows evidence of chromospheric activity. Imaging reveals a slightly fainter companion to KELT-22A that is likely bound, with a projected separation of 6″ (∼1400 au). In addition to the orbital motion caused by the transiting planet, we detect a possible linear trend in the radial velocity of KELT-22A, suggesting the presence of another relatively nearby body that is perhaps non-stellar. KELT-22Ab is highly irradiated (as a consequence of the small semimajor axis of ), and is mildly inflated. At such small separations, tidal forces become significant. The configuration of this system is optimal for measuring the rate of tidal dissipation within the host star. Our models predict that, due to tidal forces, the semimajor axis is decreasing rapidly, and KELT-22Ab is predicted to spiral into the star within the next Gyr.

Original language	English
Article number	13
Journal	Astrophysical Journal, Supplement Series
Volume	240
Issue number	1
DOIs	https://doi.org/10.3847/1538-4365/aaee7e
Publication status	Published - Jan 2019

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Labadie-Bartz, J., Rodriguez, J. E., Stassun, K. G., Ciardi, D. R., Penev, K., Johnson, M. C., Gaudi, B. S., Colón, K. D., Bieryla, A., Latham, D. W., Pepper, J., Collins, K. A., Evans, P., Relles, H., Siverd, R. J., Bento, J., Yao, X., Stockdale, C., Tan, T. G., ... Zambelli, R. (2019). KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin. Astrophysical Journal, Supplement Series, 240(1), Article 13. https://doi.org/10.3847/1538-4365/aaee7e

@article{6e10536094334b4ab1527561c13872c0,

title = "KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin",

abstract = "We present the discovery of KELT-22Ab, a hot Jupiter from the KELT-South survey. KELT-22Ab transits the moderately bright (V ∼ 11.1) Sun-like G2V star TYC 7518-468-1. The planet has an orbital period of days, a radius of , and a relatively large mass of . The star has , , K, (cgs), and [m/H] = ; thus other than its slightly super-solar metallicity, it appears to be a near-solar twin. Surprisingly, KELT-22A exhibits kinematics and a Galactic orbit that are somewhat atypical for thin-disk stars. Nevertheless, the star is rotating rapidly for its estimated age, and shows evidence of chromospheric activity. Imaging reveals a slightly fainter companion to KELT-22A that is likely bound, with a projected separation of 6″ (∼1400 au). In addition to the orbital motion caused by the transiting planet, we detect a possible linear trend in the radial velocity of KELT-22A, suggesting the presence of another relatively nearby body that is perhaps non-stellar. KELT-22Ab is highly irradiated (as a consequence of the small semimajor axis of ), and is mildly inflated. At such small separations, tidal forces become significant. The configuration of this system is optimal for measuring the rate of tidal dissipation within the host star. Our models predict that, due to tidal forces, the semimajor axis is decreasing rapidly, and KELT-22Ab is predicted to spiral into the star within the next Gyr.",

keywords = "methods: observational, planets and satellites: detection, planets and satellites: gaseous planets, techniques: photometric, techniques: radial velocities, techniques: spectroscopic",

author = "Jonathan Labadie-Bartz and Rodriguez, {Joseph E.} and Stassun, {Keivan G.} and Ciardi, {David R.} and Kaloyan Penev and Johnson, {Marshall C.} and Gaudi, {B. Scott} and Col{\'o}n, {Knicole D.} and Allyson Bieryla and Latham, {David W.} and Joshua Pepper and Collins, {Karen A.} and Phil Evans and Howard Relles and Siverd, {Robert J.} and Joao Bento and Xinyu Yao and Chris Stockdale and Tan, {Thiam Guan} and George Zhou and Eastman, {Jason D.} and Albrow, {Michael D.} and Daniel Bayliss and Beatty, {Thomas G.} and Perry Berlind and Valerio Bozza and Calkins, {Michael L.} and Cohen, {David H.} and Curtis, {Ivan A.} and Esquerdo, {Gilbert A.} and Dax Feliz and Fulton, {Benjamin J.} and Joao Gregorio and David James and Jensen, {Eric L.N.} and Johnson, {John A.} and Johnson, {Samson A.} and Joner, {Michael D.} and David Kasper and Kielkopf, {John F.} and Kuhn, {Rudolf B.} and Lund, {Michael B.} and Amber Malpas and Mark Manner and Nate McCrady and McLeod, {Kim K.} and Oberst, {Thomas E.} and Penny, {Matthew T.} and Reed, {Phillip A.} and Sliski, {David H.} and Stephens, {Denise C.} and Stevens, {Daniel J.} and Steven Villanueva and Wittenmyer, {Robert A.} and Wright, {J. T.} and Roberto Zambelli",

year = "2019",

month = jan,

doi = "10.3847/1538-4365/aaee7e",

language = "English",

volume = "240",

journal = "Astrophysical Journal, Supplement Series",

issn = "0067-0049",

publisher = "American Astronomical Society",

number = "1",

}

Labadie-Bartz, J, Rodriguez, JE, Stassun, KG, Ciardi, DR, Penev, K, Johnson, MC, Gaudi, BS, Colón, KD, Bieryla, A, Latham, DW, Pepper, J, Collins, KA, Evans, P, Relles, H, Siverd, RJ, Bento, J, Yao, X, Stockdale, C, Tan, TG, Zhou, G, Eastman, JD, Albrow, MD, Bayliss, D, Beatty, TG, Berlind, P, Bozza, V, Calkins, ML, Cohen, DH, Curtis, IA, Esquerdo, GA, Feliz, D, Fulton, BJ, Gregorio, J, James, D, Jensen, ELN, Johnson, JA, Johnson, SA, Joner, MD, Kasper, D, Kielkopf, JF, Kuhn, RB, Lund, MB, Malpas, A, Manner, M, McCrady, N, McLeod, KK, Oberst, TE, Penny, MT, Reed, PA, Sliski, DH, Stephens, DC, Stevens, DJ, Villanueva, S, Wittenmyer, RA, Wright, JT & Zambelli, R 2019, 'KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin', Astrophysical Journal, Supplement Series, vol. 240, no. 1, 13. https://doi.org/10.3847/1538-4365/aaee7e

TY - JOUR

T1 - KELT-22Ab

T2 - A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin

AU - Labadie-Bartz, Jonathan

AU - Rodriguez, Joseph E.

AU - Stassun, Keivan G.

AU - Ciardi, David R.

AU - Penev, Kaloyan

AU - Johnson, Marshall C.

AU - Gaudi, B. Scott

AU - Colón, Knicole D.

AU - Bieryla, Allyson

AU - Latham, David W.

AU - Pepper, Joshua

AU - Collins, Karen A.

AU - Evans, Phil

AU - Relles, Howard

AU - Siverd, Robert J.

AU - Bento, Joao

AU - Yao, Xinyu

AU - Stockdale, Chris

AU - Tan, Thiam Guan

AU - Zhou, George

AU - Eastman, Jason D.

AU - Albrow, Michael D.

AU - Bayliss, Daniel

AU - Beatty, Thomas G.

AU - Berlind, Perry

AU - Bozza, Valerio

AU - Calkins, Michael L.

AU - Cohen, David H.

AU - Curtis, Ivan A.

AU - Esquerdo, Gilbert A.

AU - Feliz, Dax

AU - Fulton, Benjamin J.

AU - Gregorio, Joao

AU - James, David

AU - Jensen, Eric L.N.

AU - Johnson, John A.

AU - Johnson, Samson A.

AU - Joner, Michael D.

AU - Kasper, David

AU - Kielkopf, John F.

AU - Kuhn, Rudolf B.

AU - Lund, Michael B.

AU - Malpas, Amber

AU - Manner, Mark

AU - McCrady, Nate

AU - McLeod, Kim K.

AU - Oberst, Thomas E.

AU - Penny, Matthew T.

AU - Reed, Phillip A.

AU - Sliski, David H.

AU - Stephens, Denise C.

AU - Stevens, Daniel J.

AU - Villanueva, Steven

AU - Wittenmyer, Robert A.

AU - Wright, J. T.

AU - Zambelli, Roberto

PY - 2019/1

Y1 - 2019/1

N2 - We present the discovery of KELT-22Ab, a hot Jupiter from the KELT-South survey. KELT-22Ab transits the moderately bright (V ∼ 11.1) Sun-like G2V star TYC 7518-468-1. The planet has an orbital period of days, a radius of , and a relatively large mass of . The star has , , K, (cgs), and [m/H] = ; thus other than its slightly super-solar metallicity, it appears to be a near-solar twin. Surprisingly, KELT-22A exhibits kinematics and a Galactic orbit that are somewhat atypical for thin-disk stars. Nevertheless, the star is rotating rapidly for its estimated age, and shows evidence of chromospheric activity. Imaging reveals a slightly fainter companion to KELT-22A that is likely bound, with a projected separation of 6″ (∼1400 au). In addition to the orbital motion caused by the transiting planet, we detect a possible linear trend in the radial velocity of KELT-22A, suggesting the presence of another relatively nearby body that is perhaps non-stellar. KELT-22Ab is highly irradiated (as a consequence of the small semimajor axis of ), and is mildly inflated. At such small separations, tidal forces become significant. The configuration of this system is optimal for measuring the rate of tidal dissipation within the host star. Our models predict that, due to tidal forces, the semimajor axis is decreasing rapidly, and KELT-22Ab is predicted to spiral into the star within the next Gyr.

AB - We present the discovery of KELT-22Ab, a hot Jupiter from the KELT-South survey. KELT-22Ab transits the moderately bright (V ∼ 11.1) Sun-like G2V star TYC 7518-468-1. The planet has an orbital period of days, a radius of , and a relatively large mass of . The star has , , K, (cgs), and [m/H] = ; thus other than its slightly super-solar metallicity, it appears to be a near-solar twin. Surprisingly, KELT-22A exhibits kinematics and a Galactic orbit that are somewhat atypical for thin-disk stars. Nevertheless, the star is rotating rapidly for its estimated age, and shows evidence of chromospheric activity. Imaging reveals a slightly fainter companion to KELT-22A that is likely bound, with a projected separation of 6″ (∼1400 au). In addition to the orbital motion caused by the transiting planet, we detect a possible linear trend in the radial velocity of KELT-22A, suggesting the presence of another relatively nearby body that is perhaps non-stellar. KELT-22Ab is highly irradiated (as a consequence of the small semimajor axis of ), and is mildly inflated. At such small separations, tidal forces become significant. The configuration of this system is optimal for measuring the rate of tidal dissipation within the host star. Our models predict that, due to tidal forces, the semimajor axis is decreasing rapidly, and KELT-22Ab is predicted to spiral into the star within the next Gyr.

KW - methods: observational

KW - planets and satellites: detection

KW - planets and satellites: gaseous planets

KW - techniques: photometric

KW - techniques: radial velocities

KW - techniques: spectroscopic

UR - http://www.scopus.com/inward/record.url?scp=85062625410&partnerID=8YFLogxK

U2 - 10.3847/1538-4365/aaee7e

DO - 10.3847/1538-4365/aaee7e

M3 - Article

SN - 0067-0049

VL - 240

JO - Astrophysical Journal, Supplement Series

JF - Astrophysical Journal, Supplement Series

IS - 1

M1 - 13

ER -

KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin

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